with-inverse-graphics

Macro

Summary

Executes all drawing function calls to a given port within the body of the macro with foreground and background colors swapped.

Package

graphics-ports

Signature

with-inverse-graphics (
port
) &body
body
=>
result

Arguments

port

A graphic port.

body

A body of Lisp code.

Values

result

The return value of the last form executed in
body
.

Description

The
with-inverse-graphics
macro ensures that all drawing function calls to
port
within the body of the macro are executed with the
foreground
and
background
slots of the graphics state of the port swapped around.